Matrix: use same user id colors as element

1 files changed, 22 insertions, 11 deletions

diff --git a/src/plugins/Matrix.cpp b/src/plugins/Matrix.cpp
index 8865fd9..c725fc8 100644
--- a/src/plugins/Matrix.cpp
+++ b/src/plugins/Matrix.cpp
@@ -78,18 +78,29 @@ namespace QuickMedia {
         }
     }
 
+    static int color_hash_code(const std::string &str) {
+        int hash = 0;
+        if(str.empty())
+            return hash;
+        for (char chr : str) {
+            hash = ((hash << 5) - hash) + (unsigned char)chr;
+        }
+        return std::abs(hash);
+    }
+
     static sf::Color user_id_to_color(const std::string &user_id) {
-        uint32_t color = 2166136261;
-        for(unsigned char c : user_id) {
-            color = (color * 16777619) ^ c;
-        }
-        sf::Uint8 *col = (sf::Uint8*)&color;
-        sf::Color result(col[0], col[1], col[2]);
-        result.r = std::min(255, 80 + (int)result.r);
-        result.g = std::min(255, 80 + (int)result.g);
-        result.b = std::min(255, 80 + (int)result.b);
-        result.a = 255;
-        return result;
+        const int num_colors = 8;
+        const sf::Color colors[num_colors] = {
+            sf::Color(54, 139, 214),
+            sf::Color(172, 59, 168),
+            sf::Color(3, 179, 129),
+            sf::Color(230, 79, 122),
+            sf::Color(255, 129, 45),
+            sf::Color(45, 194, 197),
+            sf::Color(92, 86, 245),
+            sf::Color(116, 209, 44)
+        };
+        return colors[color_hash_code(user_id) % num_colors];
     }
 
     UserInfo::UserInfo(RoomData *room, std::string user_id) :